Vehicle Wiring Diagrams and Fault Diagnosis Quiz Level 3

What is the purpose of a wiring diagram in vehicles?

• To display the vehicle's fuel efficiency

• To provide a list of vehicle parts

• To show the location of wires in a vehicle

• To outline the vehicle's maintenance schedule

What does the DIN code '15' represent in a wiring diagram?

• Ignition live

• Earth

• Horn relay

• Constant live

Which component uses a constant live from the battery?

• Horn switch

• Hazard warning lights

• Electric windows

• Airbag ECU

What is the standard position of the live feed on a wiring diagram?

• Right side of the page

• Top of the page

• Left side of the page

• Bottom of the page

What does the abbreviation 'Yel' stand for in wiring diagrams?

• Yellow

• Red

• Green

• White

If the horn is not working, which component should be checked first?

• Horn relay

• Horn fuse

• Horn itself

• Horn switch

What does the DIN code '31' represent?

• Constant live

• Horn relay

• Ignition live

• Earth

Which color wires run from the receiver to the alarm control unit?

• White and Green

• White and Yellow

• Red and Blue

• Yellow and Green

What is the DIN code for a constant live?

• 15

• 64

• 31

• 30

What should be tested if the turn signal relay is not working?

• Airbag ECU

• Alarm ECU

• Horn switch

• Wire connection